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formatted card, but did the same thing again. I have some 1/2" MDF that I'm going to cut tomorrow for the base of a new sled, see if that works.

Still don't know why 3/4" wont work though.

The Z truck is bottoming out, so it's not going all the way down. Look back a few posts to see my original issue along with picture of the sled I'm using and some other troubleshooting comments.
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it's not touching the sliding plate

Here's a link to a video showing what's going on. It looks like the spindle is hitting the board, causing it to stop, but that's just the camera angle.

Bit plate is swinging out as it should. Then it comes back to the other side of the machine, bobs up and down a few times then moves over and touches off the board a few times, goes back over and...

It's a new machine, so it has the CarveTight Spindle

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Here's a pic of the sled. Sled is the same width as the project piece.

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After careful study, It appears the the Z sled is bottoming out before the 1/8" cutting bit as able to touch either...

Looks like it's missing the plate by roughly 3/4".

I just attempted a project with a sled for the first time. Same as tackytim's...3/4" thick project piece & 3/4" thick sled. The project in Designer is 3/4" thick.

After touching off the board,...